Nanocomposite coating and the method of coating thereof

Abstract

A nanocomposite coating and a method of coating for protecting a product with the nanocomposite coating are presented. Firstly, the nanocomposite coating is prepared, wherein the nanocomposite coating is formed by mixing 22.5˜49.5% nanometer inorganic oxide gel made by a sol-gel method, 45˜74.25% organic solvent and 1˜10% nanometer powder together. Next, the nanocomposite coating is coated onto surfaces of the product evenly by way of spraying, dipping or roll-to-rolling. Lastly, the product coated with the nanocomposite coating is subjected to a room temperature or a heating environment lower than 170 degrees centigrade to make the nanocomposite coating dry for forming nanometer protective films on the surfaces of the product.

1 . A method of coating for protecting a product with a nanocomposite coating adapted to protect the product from being corroded and damaged by some exterior chemicals, the method comprising the steps of:
 preparing the nanocomposite coating which is formed by mixing a nanometer inorganic oxide gel made by a sol-gel method, an organic solvent and a nanometer powder together;   coating the nanocomposite coating onto surfaces of the product evenly by way of spraying, dipping or roll-to-rolling; and   subjecting the product coated with the nanocomposite coating to a room temperature or a heating environment lower than 170 degrees centigrade to make the nanocomposite coating dry for forming nanometer protective films on the surfaces of the product so as to protect the product from being corroded and damaged by the exterior chemicals;   wherein the weight percentage of the nanometer inorganic oxide gel, the organic solvent and the nanometer powder in the nanocomposite coating is 22.5˜49.5%, 45˜74.25% and 1˜10% respectively.   
     
     
         2 . The method as claimed in  claim 1 , wherein the nanometer powder is any one of or a mixture of a nanometer metal powder and a nanometer metal-oxide powder. 
     
     
         3 . The method as claimed in  claim 2 , wherein the nanometer metal powder is any one of or a mixture of at least two selected from a nanometer platinum powder, a nanometer copper powder and a nanometer nickel powder. 
     
     
         4 . The method as claimed in  claim 2 , wherein the nanometer metal-oxide powder is any one of or a mixture of at least two selected from a nanometer silicon dioxide powder, a nanometer titanium dioxide powder and a nanometer zirconium dioxide powder. 
     
     
         5 . The method as claimed in  claim 1 , wherein the nanometer powder is processed by a surfactant before being mixed with the nanometer inorganic oxide gel and the organic solvent to form the nanocomposite coating. 
     
     
         6 . The method as claimed in  claim 5 , wherein the surfactant is any one of or a mixture of a sodium dodecylsulphonate and a polyvinyl pyrrolidone. 
     
     
         7 . The method as claimed in  claim 1 , wherein the diameter of the nanometer powder is 5˜100 nm. 
     
     
         8 . The method as claimed in  claim 1 , wherein the nanometer inorganic oxide gel is any one of or a mixture of at least two selected from a nanometer silicon dioxide gel, a nanometer titanium dioxide gel and a nanometer zirconium dioxide gel. 
     
     
         9 . The method as claimed in  claim 1 , wherein the organic solvent is any one of or a mixture of an ethanol solvent and an isopropanol solvent.